Tamping-machine.



H. D MORGAN &: H. SCHOBY. TAMPING MACHINE.

. APPLICATION FILED OCT. 21, 1909. ,9?2,5 3,, Patented Oct. 11,1910.

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H. D. MORGAN & H. SCHOBY. TAMPING MACHINE.

APPLICATION FILED OCT. 21, 1909.

Patented 0013. 11, 1910.

2 BHEETB-SHEET 2.

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HARRY D. MORGAN AND HOWARD SCHOBY, OF PLAIN CITY, OHIO.

TAMPING-1VIA CHINE.

To all whom it may concern:

Be it known that we, HARRY D. MORGAN and HOWARD SoHoBY, citizens of theUnited States, and both residents of Plain City, in the county ofMadison and State of Ohio, have invented a new and ImprovedTamping-Machine, of which the following is a full, clear, and exactdescription.

This invention relates to tamping machines for use in road-making andfor like purposes, and relates more particularly to a machine of thisclass in which movable tampers are used for compacting earth or otherroad material and the like, and have associated therewith means forraising and lowering the tampers, and means for otherwise actuatingthem, so that while they are in contact with the surface of the groundthey are undergoing no horizontal movement. v

The object of the invention is to provide a simple, strong and efficienttamping machine, which can be used for road-making or for other likepurposes in which it is necessary to compact earth or other material torender the same smooth and hard, which can be used in combination with aroller, as well as without the roller, by means of which material can bethoroughly compacted, which is rapid and efficient in operation, whichis not affected by irregularities in the surface upon which it isworking, and which prevents the piling up of soft material before theroller, if the same is used in connection therewith.

The invention consists in the construction and combination of parts tobe more fully described hereinafter and particularly set forth in theclaims.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views, and in which- Figure 1 is a sideelevation of an embodiment of our invention; Fig. 2 is a plan view ofthe tamping mechanism proper, showing the means for actuating thetampers; and Fig. 3 is an enlarged, transverse section on the line 3-3of Fig. 2, certain parts being broken away.

Before proceeding to a more detailed explanation of our invention itshould be clearly understood that while we have shown for example, inthe accompanying drawings, the tamping mechanism associated with aSpecification of Letters Patent.

Application filed October 21, 1909.

Patented Oct. 11, 1910. Serial No. 523,795.

road roller of common type, the roller does not necessarily form a partof our invention, though we prefer to employ it in connection therewith.The tampers can be mounted upon a suitable supporting frame other thanthat of the roller, provided a proper motor is employed for actuatingthe tamper-controllingdevices and for advancing or propelling thesupporting frame upon the ground. The roller is the machine generallyemployed to-day, for compacting or hardening road material or the like,and our invention is intended for use as an auxiliary to the roller. Ifthe material is soft, when a roller is first passed over the same ittends to push the material ahead of it and the operation is thereforeinefficient. By first tamping the material down hard either by hand orby our tamping machine, this disadvantage is obviated. Furthermore, ifthe material is spread irregularly so that de pressions andirregularities are formed, the operation of the roller, owing to thelength of the same, is not uniform. Our individually-operable tampershowever, are unaffected by such irregularities, and compact the earth toan equal degree, regardless of depressions or elevations. Needless tosay, certain of the details of construction shown for example herewith,form no part of our invention and can be varied in accordance withindividual preference and special conditions, without departing from theunderlying spirit of the invention. As will appear more clearlyhereinafter, we provide means for raising the tampers to permit them todrop gravitationally to the ground to effect the tamping action, and atthe same time we provide means for advancing the tampers in thedirection of movement of the frame, and for permitting them to rest uponthe ground without horizontal movement, in order to avoid a scrapingaction, which would necessarily injure the road surface.

Referring more particularly to the draw ings, we have shown for example,a road roller having a frame 10 supported at the rear upon a roller drum11 journaled at the under side of the frame by means of a suitable aXle12. At the forward end, the frame sides have inwardly and upwardlyoffset parts 13 under which is pivoted a yoke 14. The forward supportingroller drum 15 is journaled by means of a shaft 16 in bearings at theends of the yoke sides in the usual manner. The yoke is pivoted and iscontrollable by suitable mechanism to permit the roller to be steeredwhen it is traveling upon the ground.

A prime mover of any suitable type is mounted upon the roller frame, andas shown for example in the drawings, may consist of a steam engine 17supplied with steam from a suitable boiler 18, and having a drivingshaft 19. A main shaft 20 is 'journaled in bearings 21 of the frame andhas a gear wheel 22 in mesh with a gear wheel 23 carried by the engineshaft 19. A propelling shaft 24 is arranged longitudi nally of theroller frame, being journaled in suitable bearings, and has a bevel gear25 in mesh with a similar gear 26 carried by the main shaft 20, asuitable bracket 27 having both shafts journaled in bearings thereof.The shaft 24 serves to operate the propelling means (not shown) foradvancing the roller in the usual manner.

Mounted upon the parts 13 of the frame sides is a shaft 28 extendingtransversely of the roller frame. Levers 29 are movably carried upon theshaft 28 by means of bearings 30 and each has the rear end downwardlydisposed. A stop bar 31 extends transversely of the frame sides in frontof the shaft 28, and serves to limit the clownward movement of thelevers. Each of the latter, at the forward projecting end carries atamper 32 of any suitable form and weight, and secured thereto by chainsections 33 or other suitable link. The tampers naturally have the lowersurfaces smooth and are of any suitable number, as shown for exampleherewith, four in number.

Each of the frame sides has mounted thereon a carrier 34, at the upperend of which is a bearing 35. In these bearings 35 is journaled a shaft36 having a plurality of crank disks 37. These crank disks havelaterally extending pins 38, each disk having two pins substantially 180apart. The pins are adapted to engage at the rear ends of the levers todepress these ends when the shaft 36 is rotated, so that the levers canbe actuated to raise the tampers.

At the forward ends of the parts 13 are located bearings 39, in which isjournaled a crank shaft 40 having a plurality of cranks 41 correspondingin number to the tampers. Each crank controls a connecting rod 42pivotally mounted upon the crank by means of a bearing end 43 andpivotally secured at a bracket 44 of the corresponding tamper. Theshafts 36 and 40 have sprocket wheels 45 and 46 respectively,operatively connected by a chain 47 so that the crank shaft can bedriven through the agency of the shaft 36. The latter has a gear wheel48 in mesh with a pinion 49 mounted upon a shaft 50 journaled under theshaft 36, in bearings 51. The shaft 50 has a gear wheel 52 in mesh witha pinion 53 mounted upon a spindle 54 and in mesh with the gear wheel22, so that the shaft 50 is operatively connected with the driving shaftof the prime mover. Suitable means 55 are provided for shifting thepinion 53, which is slidable, to render the tamperactuating mechanisminoperative, so that if desired the device can be used as a road rollerwithout the cooperation of the tamp ing mechanism.

By the provision of two crank pins 38 on each of the disks 37, eachlever is raised and permitted to fall twice during a revolution of theshaft 36. The sprockets 45 and 46 are so proportioned that the crankshaft makes two revolutions for each revolution of the shaft 36.Consequently, eachinpwai d and downward movement of a/"tamper isaccompanied by a forward movement and a corresponding backward movementof the connecting rod controlling the tamper. The driving mechanism andthe parts controlling the same are so proportioned that the backwardmovement of the connecting rod is equal to the forward movement of theframe, and consequently, as each tamper comes into contact with theground it remains atrest and there is no scoring or scraping of thesurface.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent 1. In a machine of the class described, a frameadapted to be propelled upon the ground, a movable tamper carriedthereby, means for raising and lowering said tamper from and to theground, and means for advancing said tamper in the direction of themovement of said frame.

2. In a machine of the class described,

ground, a movable tamper, means for rais ing said tamper and forreleasing the same to permit its gravitational return to the ground, andmeans for moving said tamper in the direction of travel of said frame,said last-mentioned means permitting said tamper to rest upon the groundwhile said frame travels a predetermined distance.

3. In a machine of the class described, a frame adapted to be propelledupon the ground, a movable tamper, means for raising said tamper and forreleasing the same,

whereby said tamper returns to the ground gravitationally, and meansoperable simultaneously with said first means, for advancing said tamperin the direction of travel of said frame while said tamper is beingraised, said last-mentioned means having a movement in a directioncounter the direction of travel of said frame while said tamper isresting upon the ground.

4. In a machine of the class described, a frame, a prime mover thereon,a lever, a tamper associated with said lever, mech- 105 frame adapted tobe propelled upon the anism operable by said prime mover for raisingsaid lever, and for releasing the same to permit said tamper to fall tothe ground, a crank controlling said tamper, to move the same in ahorizontal direction, and means connecting said crank and saidlever-operating mechanism.

5. in a machine of the class described, a frame adapted to be propelledupon the ground, a prime mover for actuating same frame, a pivotedlever, a tamper associated with said lever, a shaft having a crank disk,said disk controlling said lever to raise the same and to release it, acrank for moving said tamper horizontally, and means operativelyconnectingsaid crank and said shaft.

6. In a machine of the class described, a frame adapted to travel uponthe ground, a movable tamper carried by said frame, means for raisingsaid tamper and permitting the same to return to the groundgravitationally, means for moving said tamper forward, and means forpermitting said tamper to rest upon the ground during a forward travelof said frame substantially equal to the distance said tamper was movedforward.

7. In a machine of the class described, a frame adapted to be propelledupon the ground, a movable tamper, means for raising said tamper and forreleasing the same, whereby said tamper returns to the groundgravitationally, and means operable simultaneously with said firstmeans, for advancing said tamper in the direction of travel of saidframe while said tamper is being raised, said lastmentioned means beinginoperative with respect to said tamper while the same is in contactwith the ground.

8. In a machine of the class described, a roller, a prime mover carriedby said roller and having means for propelling the roller, a movabletamper carried by said roller, means actuated by said prime mover forraising and lowering said tamper, and means actuated by said primemover, for advancing said tamper in the direction of movement of themachine.

9. In a machine of the class described, a frame, roller drums supportingsaid frame, a prime mover carried by said frame, means actuated by saidprime mover for advancing said frame, a lever pivoted upon said frame, atamper associated with said lever, a shaft having a crank diskcontrolling said lever, a crank for reciprocating said tamper andoperat-ively connected with said shaft, and means for operativelyconnecting said shaft and said prime mover, said last-mentioned meansbeing adapted to be operatively and inoperatively disposed.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

HARRY D. MORGAN. HOlVARD SCHOBY.

Witnesses O. F. Hancnn, C. WV. HORN.

